Majestic 300DVBHN/PV7 Manual page 20

DVBH7 Series Direct Vent Gas Fireplace
Step 7
Guide the vent terminations 4" and 7" collard into their
respective vent pipes. Double check that the vent pipes
overlap the collars by " (51 mm). Secure the termina-
tion to the wall with screws provided and caulk around
the wall plate to weatherproof. As an alternative to screw-
ing the termination directly to the wall, you may also use
expanding plugs or an approved exterior construction ad-
hesive. You may also attach the termination with screws
through the inner body into the 4" vent pipe, however for
this method, you must extend the 4" pipe approximately
6" (15 mm) beyond the outer face of the wall.
Support horizontal pipes every 36" (914
mm) with metal pipe straps.
VeRtICAl SIDeWAll INStAllAtIoN -
Flex VeNt PIPe
Note: The 40" (1016 mm) flex vent is used for 90° off the
top of the unit then out the back wall.
Follow Step 1 and  on Page 19.
Step 3
Install the four (4) spacer springs on the 4" flex vent pipe.
When installing the spacer springs around the 4" pipe,
stretch the spring to approximately 15" (381 mm), wrap
the spring around the pipe and interlock the ends of the
spacer spring approximately " (51 mm). Measure 6C\v"
(17 mm) from the end of the pipe. Place the next spring
5" (17 mm) from the previously installed spring. Place
the next spring 6" (15 mm) from the last spring. Finally
place the last spring 1" (305 mm) from the last spring
installed. Figure 31
Step 4
Install the 4" (10 mm) flex vent pipe to the appliance col-
lar as described on Page 14. Secure the end with the first
spring 6C\v" (17 mm) from the flex pipe end to the unit.
Step 5
Slide the 7" (178 mm) flex vent pipe over the 4" flex vent
pipe and secure the 7" collar as described on Page 13.
Step 6
Bend the flex pipe horizontal so the bottom of the horizon-
tal pipe measure 6Z\x" (165 mm) from the top of the unit
immediately after the 90° formation. Figure 32. Be sure to
follow the 1/" (13 mm) rise in a 1" (305 mm) horizontal
run rule.
Step 7
Install the 4" flex then 7" flex to the termination.
0
VeNtING INStAllAtIoN
4" Flex Vent Pipe
Spacer Spring
Figure 31 -
Install Spacer Springs
FP1475
Figure 32 -
Bend flex vent at 90° so horizontal por-
tion is 6Z\x" (165 mm) off top of unit
12"
(305mm)
6"
(152mm)
5"
(127mm)
6 "
(172mm)
FP1474
FP1474
spacer springs
4/04 djt
6 " (165mm)
FP1475
flex 90 bend
4/04 djt
54D8001